Help me! I’ll mark you and give extra points!

Technician a says that if a valve is open when a piston rises to the very top of a cylinder, the piston may actually strike the valve head and cause serious engine damage. technician b says if the camshaft is located in the engine block, then the engine is called an overhead valve engine, ohv engine, or an in-block camshaft. who is right? a. b only b. both a and b c. a only d. neither a nor b

The editing of digital photos us about the same level of difficulty as editing an analog photo

Ihave an iphone 8plus should i get another phone like samsung note 9 or s9 ? ?